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nixos/tests: restructure test driver so that QEMU is actually overriden

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Previously you would be able to override only the QEMU package to be
used in the test runner. Frankly that doesn't help a lot if you are
trying to get a graphical session. The graphical session requires the
option in the NixOS module system to bet set to the correct QEMU
package.

In this commit I moved most of the test node configuration and
transformations into the `mkDriver` function (previously called
`driver`). The motivation was to be able to create a `driver` instance
with a given QEMU package that will be used consistently througout the
test expression.
This commit is contained in:
Andreas Rammhold 2020-10-23 23:09:18 +02:00
parent d2a28d3b38
commit 04100cd281
No known key found for this signature in database
GPG Key ID: E432E410B5E48C86
1 changed files with 48 additions and 31 deletions
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75
nixos/lib/testing-python.nix
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@ -9,7 +9,6 @@
# Modules to add to each VM
, extraConfigurations ? [] }:
with import ./build-vms.nix { inherit system pkgs minimal specialArgs extraConfigurations; };
with pkgs;
rec {
@ -51,9 +50,6 @@ rec {
'';
};
testDriver = mkTestDriver qemu_test;
testDriverInteractive = mkTestDriver qemu_kvm;
# Run an automated test suite in the given virtual network.
# `driver' is the script that runs the network.
runTests = driver:
@ -88,25 +84,7 @@ rec {
maxTestNameLen = 50;
testNameLen = builtins.stringLength name;
testDriverName = with builtins;
if testNameLen > maxTestNameLen then
abort ("The name of the test '${name}' must not be longer than ${toString maxTestNameLen} " +
"it's currently ${toString testNameLen} characters long.")
else
"nixos-test-driver-${name}";
nodes = buildVirtualNetwork (
t.nodes or (if t ? machine then { machine = t.machine; } else { }));
testScript' =
# Call the test script with the computed nodes.
if lib.isFunction testScript
then testScript { inherit nodes; }
else testScript;
vlans = map (m: m.config.virtualisation.vlans) (lib.attrValues nodes);
vms = map (m: m.config.system.build.vm) (lib.attrValues nodes);
ocrProg = tesseract4.override { enableLanguages = [ "eng" ]; };
@ -115,8 +93,38 @@ rec {
# Generate convenience wrappers for running the test driver
# interactively with the specified network, and for starting the
# VMs from the command line.
driver = testDriver:
mkDriver = qemu_pkg:
let
build-vms = import ./build-vms.nix {
inherit system pkgs minimal specialArgs;
extraConfigurations = extraConfigurations ++ (pkgs.lib.optional (qemu_pkg != null)
{
virtualisation.qemu.package = qemu_pkg;
}
);
};
# FIXME: get this pkg from the module system
testDriver = mkTestDriver (if qemu_pkg == null then pkgs.qemu_test else qemu_pkg);
nodes = build-vms.buildVirtualNetwork (
t.nodes or (if t ? machine then { machine = t.machine; } else { }));
vlans = map (m: m.config.virtualisation.vlans) (lib.attrValues nodes);
vms = map (m: m.config.system.build.vm) (lib.attrValues nodes);
testScript' =
# Call the test script with the computed nodes.
if lib.isFunction testScript
then testScript { inherit nodes; }
else testScript;
testDriverName = with builtins;
if testNameLen > maxTestNameLen then
abort ("The name of the test '${name}' must not be longer than ${toString maxTestNameLen} " +
"it's currently ${toString testNameLen} characters long.")
else
"nixos-test-driver-${name}";
warn = if skipLint then lib.warn "Linting is disabled!" else lib.id;
in
warn (runCommand testDriverName
@ -124,6 +132,9 @@ rec {
testScript = testScript';
preferLocalBuild = true;
testName = name;
passthru = {
inherit nodes;
};
}
''
mkdir -p $out/bin
@ -154,9 +165,12 @@ rec {
meta = (drv.meta or {}) // t.meta;
};
test = passMeta (runTests (driver testDriver));
driver = mkDriver null;
driverInteractive = mkDriver pkgs.qemu;
nodeNames = builtins.attrNames nodes;
test = passMeta (runTests driver);
nodeNames = builtins.attrNames driver.nodes;
invalidNodeNames = lib.filter
(node: builtins.match "^[A-z_]([A-z0-9_]+)?$" node == null) nodeNames;
@ -171,9 +185,8 @@ rec {
''
else
test // {
inherit nodes test;
driver = driver testDriver;
driverInteractive = driver testDriverInteractive;
inherit test driver driverInteractive;
inherit (test) nodes;
};
runInMachine =
@ -184,7 +197,11 @@ rec {
, ... # ???
}:
let
vm = buildVM { }
build-vms = import ./build-vms.nix {
inherit system pkgs minimal specialArgs extraConfigurations;
};
vm = build-vms.buildVM { }
[ machine
{ key = "run-in-machine";
networking.hostName = "client";